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Image to KB Converter
Compress any photo to an exact size in KB — 20 KB, 50 KB, 100 KB or any number you type.
Image to KB Converter — Compress Any Photo to an Exact File Size
To convert an image to KB, upload your photo, type the exact size you need — 20 KB, 50 KB, 100 KB or any custom number — and download the result. The tool compresses the picture to that target and saves it as an optimised JPG.
Everything runs inside your own browser, so the photo never leaves your device. Original files up to 5 MB are supported, which covers virtually every phone-camera photo.
Upload
Pick your image. JPG, PNG, WebP and other common formats all work.
Set the size
Choose 20, 50, 80 or 100 KB — or enter any custom KB target of your own.
Download
Save the compressed JPG. The exact final size is shown before you download.
What Size Should Your Image Be?
Different forms ask for different limits. These are the targets people request most often — but always check the exact figure printed on the form you are filling in, because portals vary.
| Target size | Typically used for |
|---|---|
| 10–20 KB | Signature images on exam and bank forms |
| 20–50 KB | Passport-size photographs on application forms |
| 50–100 KB | Photo plus signature together, or a light document scan |
| 100–200 KB | Scanned certificates and mark sheets |
| 200–500 KB | Higher-detail scans where the portal allows a larger cap |
These are shortcuts, not limits — the custom field accepts whatever KB number you type.
Convert an Image to JPG at an Exact KB Size
Whatever you upload — PNG, WebP, HEIC-exported JPEG or a plain JPG — the compressed file you download is always a standard .jpg. That makes this a one-step "image to JPG in 50 KB" converter rather than two separate jobs.
It matters because JPG is the format most upload forms accept, and it compresses photographs far more efficiently than PNG. A PNG screenshot that will not drop below 300 KB often lands comfortably under 50 KB once it becomes a JPG. So if you need image to JPG 50 KB, image to JPG 100 KB or convert image to JPG 20 KB, the conversion and the size target happen in the same pass.
How to Convert an Image from MB to KB
MB and KB are the same unit of measurement at different scales: 1 MB is 1,024 KB. A 3 MB photo is therefore about 3,072 KB, and getting it "from MB to KB" simply means compressing it until it falls under a KB figure.
Upload the file, enter your target — say 100 — and the tool works down through JPEG quality levels until the result fits. A typical 2–4 MB phone photo compresses to 50–100 KB without looking obviously degraded at normal viewing size. Files up to 5 MB can be processed.
This tool runs entirely inside your phone or computer's browser. Your photos are never sent to any server, ours or anyone else's. There is no account, no login and no queue — which also means it keeps working on a weak connection once the page has loaded.
What Does "Image to KB" Actually Mean?
It means reducing a picture's file size — the space it takes up on disk, measured in kilobytes — to a specific target such as 20 KB, 50 KB or 100 KB, while keeping the picture as clear as possible. This is separate from its dimensions in pixels: a 1200×1200 photo can be 2 MB or 40 KB depending on how heavily it is compressed.
Upload forms almost always police file size rather than dimensions, which is why an otherwise perfect photo gets rejected. Compressing it to the stated KB limit fixes that.
Need something else? Use our Image Converter to switch between JPG, PNG and WebP, the PAN card photo & signature resizer for NSDL/UTI specifications, or convert JPG to BMP.
Frequently Asked Questions
How do I reduce an image size in KB?
Upload the image, enter the KB figure you need, and download the result. The tool lowers JPEG quality in steps until the file fits your target, then shows you the exact size it achieved before you save it.
How do I convert an image to JPG at exactly 50 KB?
Upload any image and set the target to 50. The download is always a .jpg file, so the format conversion and the size reduction happen together — you do not need a separate converter first.
How do I convert an image from MB to KB?
1 MB equals 1,024 KB, so this is just compression. Upload your MB-sized photo, type a KB target such as 100, and download. Originals up to 5 MB are supported.
Will my photo go blurry at 20 KB?
Some quality loss is unavoidable at very small targets — that is what compression is. The tool stops at a quality floor rather than destroying the image, so faces and signatures stay legible. Starting from a sharp, well-lit original makes a large difference; a photo that is already blurry cannot be improved by compressing it.
What size should my photo be for a government or exam form?
There is no single answer — each portal sets its own limit, commonly 20 KB for signatures and 50–100 KB for photographs. Check the instructions on the form itself, then enter that exact number here.
Are my photos uploaded to your server?
No. All processing happens in your browser using your own device's resources. The image is never transmitted anywhere, which is why the tool also works if your connection drops after the page loads.
Does it work on a mobile phone?
Yes. It runs in the mobile browser exactly as it does on a desktop — no app to install.
Which formats can I upload, and what do I get back?
You can upload JPG, PNG, WebP and other common image formats. The output is always an optimised JPG, because JPG achieves far smaller file sizes on photographs than PNG and is the format most upload forms expect.
Can I compress a PNG or WebP to a KB target?
Yes. Upload the PNG or WebP and set your target — it will be converted to JPG at that size. PNGs in particular shrink dramatically this way, since PNG is designed for lossless graphics rather than photographs.
Is there a limit on the original file size?
The original can be up to 5 MB. There is no limit on how small the target can be, though extremely small targets on a large, detailed photo will show visible compression.
Can I increase an image's size in KB?
No — this tool only reduces file size. If a form demands a minimum file size, the usual fix is to save the image at higher quality or larger pixel dimensions in an editor, which naturally increases the KB.
